Research Article
Oct 1977
Erosion by Impinging Circular Turbulent Jets
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 103, Issue 10
Abstract
This paper presents an experimental study of the erosion of loose beds of sand and polystyrene by impinging (submerged) jets of air and water. The maximum depth of erosion increases linearly with the logarithm of time up to a characteristic time value beyond which the variation becomes nonlinear and eventually approaches an asymptotic state. For large impingement heights, the asymptotic values of the maximum depth and radius of erosion in terms of the impingement height have been found to be mainly functions of the densimetric Froude number divided by the impingement height in terms of the diameter of the jet at the nozzle. Some correlations have also been found for small impingement heights. The geometric form of the eroded bed profile, in the unsteady as well as in the asymptotic state, has been found to be similar.
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Published In
Journal of the Hydraulics Division
Volume 103 • Issue 10 • October 1977
Pages: 1191 - 1205
Copyright
© 1977 American Society of Civil Engineers.
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Published in print: Oct 1977
Published online: Feb 3, 2021
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Nallamuthu Rajaratnam, M.ASCE
Prof., Dept. of Civ. Engrg., Univ. of Alberta, Edmonton, Canada
Spyridon Beltaos
Research Officer, Transportation and Surface Water Engrg. Div., Alberta Research Council, Edmonton, Canada
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